Thales Theorem. One of the first great moments in Mathematics (600 BC).

Feuerbachs Theorem. A great moment in Mathematics. More difficult to see and teach: no wonder humans discovered it much later (1822 AD)

Hippocrates theorem An attempt to find the quadrature of the circle.

Pappus theorem.

Please send questions and comments to knill@math.harvard.edu

Math E320| Oliver Knill | Spring 2010 | Extension School | Harvard University